Long sleep was associated with consuming less theobromine, which is found in chocolate and tea, the saturated fat dodecanoic acid, choline found in eggs and fatty meats and total carbohydrates.

CNN: Does your diet influence how well you sleep?

The drink has three components -- uridine, choline, and the omega-3 fatty acid DHA -- that, working together, help restore synapses, said Dr. Richard Wurtman, professor at the Massachusetts Institute of Technology and co-author of the study.

CNN: Nutritional drink, imaging show promise for Alzheimer's